More Asserts with Better Names

Building off of the work of @cmoralesweb, I went through and updated most of the function names to read a bit more clearly.

**Pros**
- Verify calls now look nearly like plain English sentences
- Should make the framework a bit easier to understand for novice devs.
- Some function names are a bit more consistent (e.g. `isInteranlType` now matches `isInstanceOf`).

**Cons**
- Breaks backwards compatibility (this could certainly be fixed if necessary)
- Moves the syntax further away from existing PHPUnit function names

Honestly, I can see this pull request going either way so I will not be surprised or offended if it's rejected. I wanted to give it a shot however and see what the community had to say.